Damper regulator



1F eh.

. T. o. PERRY DAMPER REGULATOR Filed 001;. 17, 1919 5 sheets-sheet 1 IINVENTOR.

)Fe'b. 2'7, 1923. 1,446,481 T. O. PERRY DAMPER REGULATOR Filed on. 17, 1919 s sheets-sheet 2 INVENTORI atente it 27, l

Application filed Get-obey 1? To (5 10710; it may, cormzm...

l e it lE10WH that l. llrioti is (l. PERRY. i. the bi s. res at i and State co 5 address is 1.

lllinois) 1', oil? which the itollowiiig is it speci 1 My invention relates to improvements in re uh l r: in which the damper .wer is indirectly ope it leii -iermitteiit actions are controlled by the expansions tions of a. thermal couple; and if my improvements are first. to i and elifectiie uiec...

. ism lor 'l'l'estli'igj; the occzisioiizil acby Very slight expensive wages iii the thermal coulotions oi? temperaeffect partial or coii'iplete enieii s conditions require;

to provide for convenient and installation.

L: 1 these objects by the mechanism illustrated iii the accompanying drawings.

which Figure 1 shows lilll'tlOii of .l r section with 21 sin ll hot water heater or the usual variety 1 uriuiisz coal; lhcg. 2 is an en- -1 ,1 n .I 1 iI .I. I c new o. tie ad ust-1o e roio connect Fi 3 saows an enlcrg enieot of one h a q. the damp r roe clamps; fig. 4; 18 an enlztrgzed vi iv the lower endot the damper our showiii how the dziuu'ier rod connects ahly i.lieie' .i'itli; 5 is an red front view of the thermal couple ports immediately connected therewith (i: V 6 till enparts howii d sectional i. it .ii are m IUMiLYULELTQR.

1319. Serial No. 331,501.

i 'lar numerals reter to similar parts thr ,u 'hout t ie seve .al v ews.

"-StlilQ E. as illustrated in Fig. l, is to l by screws to the under side ot a lmard or her whi :h is suspended by chains troiii the ceiling oi room containing the r 1 source or neat. Ll. hoard 4: may be secured to the cm hug from which. to hang the chains.

tiesti'og 1 supports a thermal rod 5 which hangs from on zuliustuhle bearing 6 screwed into the upper sir e of the casting. The uper one (it the theruuil rod teriiiinetes in A hanger screw '7 whose head rests and turns upon in interior shoulder of the adjustable hearing. Just beneath th adjusting bearlug a dimmer spool R is secured to the thermal rod hy means (it the stop pin 9 one end oi which projects beyond the spool and is zulzi'ptei l to engage the shoulder pin. 10 set in the casting. to liini" the rotational. movement of the damper spool. The set screw 11 serves to "prevent the hanger screw from tui'nii in the thermal rod. One end oi the dzuuper cord 12 is caught on to the stop pin, wound around the damper spool once or twice and from thence led over a damper sheave 13 attached to the bar 2, down to connection with the damper mechanism. liUUGlltll the damper spool. a bearing tube 1- is fixed at its upper end into the under side of. the casting and extends downward to form ii hearing tor the active rotative element 15 which has a cylindrical exterior surface around which the motor cord 16 is sound several. times and fastened at one "nil hy moons of the hitching screw 17. The

t motor cord is led over the motor sheave 18 zittueied to the bar :3 mid sustains the i2 0- Noruuilly. the active row- 01 tire to is sustained by a non-rotall i 21-22, attached to the casting;

phernl shoulder t which. resists rohe non-rotati e ii 3" hen iiig all ed to lnsteu d o r ot id its circus: is preterr from make the immediate su port consist of two in frictional buttons 91 oppositely atring "22 by means the thrust cap,

of the button holders 28 which are secured to the ring by means of the screws The frictional buttons may be made in the form of discs perforated at the center to receive retaining pins 25 driven into the button holders. The supporting ring is preferably supported pivotally at two opposite points midway between the frictionalbuttons by means of the pivot screws 26 which screw tightly through depending spurs 27 of the casting and have reduced ends which enter pivot holes in the supporting ring.

The bearing tube 14c also constitutes a lower bearing forthe thermal rod which extends downward some considerable distance and carries at its free lower end a supporting cap 28 which upon a re taining pin 29 piercing the end of the rod. The thermal tube 30, inclosing the thermal rod, rests upon the supporting cap at its lower end and has at its upper end a thrust cap 31 which is free to slide on the thermal rod when the tube expands or contracts. The passive rotative element 32 has a central opening, large enough to receive loosely and two opposite thrust pins 33 whose inner ends project into the central opening so as to bear upon the periphery of the thrust cap. This passive rotative element extends some distance to either side of the axis of the thrust pins and carries at its extremities balanced push buttons 3a which are disposed to make more or less intimate contact with the lower circular peripheral shoulder 35 of the active rotati've elemenu as the thermal tube expands or contracts with changes in temperature. These push buttons are similar to the frictional buttons 21 and are retained in the same way by central pins. A flexible actuating plate 36 made of thin sheet metal is scoured to a cylindrical hub 37 which in turn is pinned on the thermal rod so as to partake of the rods rotative motion. On either side of the thermal rod, some distance away, the flexible ends of the plate are pierced loosely by actuating pins 38 which are driven into the passive rotative element, just inside of the push buttons. The flexibility of this actuating plate greatly reduces frictional resistance to longitudinal thermostatic dsplaccment of the passive element while subjected also to rotative tension.

The damper cord 12, as shown in Fig. 1, connects with the damper lever 39 by means of astiff wire loop 40 which can slip vertically on the headed button all projecting from the side of the lever. The loop is formed on the lower end of a wire 12 which extends up to meet the damper cord, from which it hangs by means of an adjustable screw connection 4:3, shown enlarged in F 2. A T splice 4-4 joins the damper lever 39 with the damper bar at about right angles thereto. The damper rods 46 and ll.

in this case,

extremities of the damper bar. A circular notch 51 at the end of the dam oer rod is readily hooked mto or released irom Lin.

lre'hole sha ed erforation 52 formed in either end of the damper bar, illustrated in the enlarged Fig. 6 The upper door 4M, is the feed door for fuel and the lower door 49 is the draft door for supplying air beneath the grate. A long clevis 53 straddles and connects pivotally with the 'l" splice ts and is drawn upward and ward by a ceiling wire 54; which includes an adjustable screw connection 55.- The ceiling wire-is shortened suflicicntlyto lift both doors clear of the catches and 57, and the weight of the doors being partially supported by the inclined ceiling wire, both are normally held closed without being latched. But the weight of the dalever 39, aided, if need be, by the weight 58, tends to open the c whenever the tension of the damper cord is relaxed. l/Vhen the draft door is opened b the weighted lever, the damper bar fulcrums on the upper damper rod. ll hen the damper lever is lifted by the damper co the draft door must first close bfforc' feed door will open. After the draft door closes, further lifting of the damper lever opens the feed door, the lower dam iuzr rod then acting as a fulcrum. Tu. the reverse action, the feed doorv must close before the draft door will open. This damper mechanism is very similar to that shown in my application No. 260,542, filed @ct. llllll, for heat regulator. v

The operation of the regulator is as follows: The thermal tube 30 and the thermal rod 5 form a thermal couple whose unequal expansion and contraction due to changes in temperature initiates the an of a motive force adapted to orarcome one natural resistance to displacement of damper mechanism and in turn releases damper mechanism to resume its initial po sition.

The active rotative element 15 is con stantly impelled to rotation in one direction by the tension of the motor cord '16 which sustains the motive weight. but is normallv more or less restrained from rotation by I frictional contact with the non-rotativc fric tional buttons 21, the friction at its maxi mum being sufficient to prevent rotation. The passive rotative element 32 is normallv inactive and allows the damper mechanism to take. of its own accord. the posh-ion naturally assumes. through gravitation'al action or otherwise; but when expansionof the thermal tube 30 thrusts the push buttons 34 against the peripheral surface of the active rotative element 15, the frictional con- Y 7' never be found bu MOW; v

J1 r I f: 1 $1011 on eleme v L me 7 mantis an %;0 loi'aiion Eng-Jon 01113", SH ally hold th s Weight. released. time they any one 11 c-iar Wm increase in temperature. In the reverse movement the feed door closes gradually and is liableto stop in any intermediate posified :form of the damper regulator in which the active rotative element 59 and the passive rotative element 60 bothhave horizontal axes 61 and 62. The action isthe same as in the previous case except that here it is the cylindrical surfaces of the two rota-tive elements which make contact with' each other instead of flat contact surfaces. The non-rotative supports 63against which the cylindrical surface of the active element rests are represented as it flat." A"motijr sheave is not necessary in this'case since the motor cord Get, as it unwinds from tl' e cylindrical surface of the active element suspends the motiveweight 65 without change or direction.

The thermal rod 66 is screwed securely into the lower end of the casting 67 which is supposed to be supported from the ceiling of the room containing the source of heat to be regulated, or in any convenient manner. An adjusting screw 68 witha cylindrical head screws into the lower end or the thermal rod 66 and supports on its head the supporting cap 69 on which rests the thermal tube '70 whose upper end terminates in the thrust cap 71. A thrust plate 7 2 with a central opening'large enough to receive loosely the thrust cap has two thrust pins 73 whose inner ends bear against the'thrust cap on opposite sides, as shown in Figs. 1-3 and 14s. At opposite ends of the thrust plate are sockets 74 adapted to receive loosely the lower ends of two thrust rods 75 which pass through the lower part of the casting 67 and sustain at their upper ends two thrust bearings 76 for the axle 62 of the passive rotative element. The ends ofthe axle 62 have flanged roller bearings 77 which are tree to move vertically in rectangular guide slots 78 cut in the sides of the casting. The passive thermal element consists of two rotative discs 60 rigidly united by an intermediate damper s pool 79 having a common axis with the discs. The active rotative element 59 normally rests upon the non-rotative supports 63 from which its pressure may be more or less relieved by expansion of the thermal tube, and the ends of its axle 61 have flanged roller bearings 80 which are free to move vertically in the rectangular guides 81 cut in the sides of the casting. The hitching screw 82 holds one end of the motor cord ea which winds several times nasa :motive weight 65 at its other end.

' The screw 83 holds one end of the damper cord 84 which winds once or twice around the damper spool 79 and is led over the damper sheave 85 down to the hinged damper 86whose weight ispartially sustained by the damper cord. Thedamper seat 87 incloses an opening whichmay coinmunicate' either with the flue of a heater, or with the ashpit, or with the open air. An adjustable stop 88, screwed through an arm 89 integral with the damper, serves to limit the damper movement, and incidentally limitsthe operative movement or the motive weight. i i I claim:

1. The combination with damper mechanism and "a bodily displaceable active ele ment which isalso rotativ'e for actuating said damper mechanism in one direction, of a rotatable passive element capable of rotation "in one direction by frictional contact with said active element and revolvable in the reverse direction'by said damper mechanism' connected "therewith, non-rotative support for said active element limiting bodily displacement in one direction'while offering "frictional resistance to "rotation and a thermal couple whose expansions and contractions due to changes in temperature produce variations in pressure between said active and passive elements and also between said active element and said non-rotative stantially as herein set forth.

2. The combination with damper mechanism and a bodily displaceable active element which is also rotative for actuating said damper mechanism in one direction, of a rotatable passivefelement capable of rotation in one direction by frictional contact with said active element and revolvable in the reverse direction by said damper mechanism connected therewith, 'non-rotative support for said active element limiting bodily displacement in one direction while offering frictional resistance to rotation, a

motor tending to rotate said activeelement of a rotatable passive element capable of ro tation in one direction by frictional contact w th said active element and revolvable in the reverse directlon by said damper mechanism support, subreeeeei connected iii-it.

nicuts is well I support and tially as i181 ei i The conibin damper :nech ae lenie act ire nisni, a bociii di which is damper no hanisni 'ection and a motire might teudi t to to said actixe lenient fable passi.e element ca e of rotation in one direction b: trictienal con'ai-twith said ive elent and revel ,tilOlQ in the reverse 1' ctioii i sail damper mocha] ect thci e with, non-rotative support tor said active element offering: frictional resistance to rot-alion by opposing: lJOilllj displacement in one direction and a t ierinal couple whose expansions and contractions due to changes in temperature produce Yariations in pi sure between said active andv passive elements and between said active ei niont and said non-rotativc support substantially as herein set forth.

The combination with damper mechanisnn a bodily displacoable cl 1 which is also rotative for actuating said dan'iper mechanism in one direction contrary to gravitational resistance and a motor giving; constant rotatire tension to said active element, of a rotatable passive element capable of rotation in one direction frictional contact: with active element and revolvable in the reverse direction by gravitational action of said damper mechanism connected therewith, non-rotative supper for said active element offering "frictional resistance to rotation by opposing bodily displacement in one direction and a thermal couple whose expansions and contractions due to changes in temperature produce variations in pressure between said active and passive elements and between said active element and said nonrotative support, substantially as herein set forth.

6. The combination with damper mechanism. an axially displaceablo active elenien which is also rotative tor actuating sa'd damper mechanism in. one direction against gravitational resistance and amotive weight tending; to constantly rotate said act-ive element, oi" an axially (lisp aceable passive element capable oft rotation in one direction by frictional contact with said tire element and ievolvable in the reverse rection by gravitational action of said dam-- per mechanism when released, non rota-tive l J, I l sipport to! said tiQtlYC element :i' lipional resistance to rotation by li'iu. (ii 7 ward and a thermal conpie whose expansions and contra :tions due to temp rature cha es raise or cl.i' .pre: s said pas irc element iroducir VzLltl'illOllEl i Joe s 11 Lid pausii'o u pressure bet elements and and as herein forth.

The coinliinatioi with ..i selt acting by ion an, active :3

inst grai @iecn said a tive element su pp ort sul istanti all ly niper mocha-- one ditile in i'li/ :oi 1 trio erniai "as du I depress I couple w i i i 10 var 7 their trictronal COTLQKCZTS? port against whicl'i said act ve element nor- 1 presses but troin which the pressure nal 11121 be relieved by action of said the couple and a motor constantly actuating;

aid active element-to rotate in one direction against frictional resistance of support and the natural resistance ot said damper mechanisnn substant ally herein set forth.

9. The combination with damp-er iuechanisno o passive element capable of rot tion whose bearings also permit of its bc-iil l displacement. a thermal couple adapted expansion a: d contraction displace sai. passive oleinnt hodil V.. operative rotat connection bet teen said damper mechanism and said passive element, active rotet elementwh )se periphery is dispose to re ceive frictional con act with said passive lenient axial be go for said acti e element which permit of its bodily displacement, at non-rotative support Which normally resists rotation and lnnits bodily displacement of said active element in one dlrection and a motor adapted to impart constantly 10. The combination with damper mecha nism, a passive element capable of rotation whose bearings permit also of its bodily displacement, a thermal couple, rotative actuatint; connection of said passive element with said damper mechanism and thrust connection whereby expansions and contractions in said thermal couple bodily displace said passive element, of an active rotative element also bodily displaceable disposed to receive increasing frictional contact with said passive element when said thermal conple expands, a motor which constantly imparts rotative effortto said active element and a non-rotative support disposed to limit the bodily displacement of said active element in one direction, offer frictional resistance to its rotative efforts and permit easement of its frictional contact with said passive element when said thermal couple contracts, substantially as herein set forth.

11. The combination with damper mechanism and a passive element capable of rotation for actuating said damper mechanism, of a rotative active element whose peiplr eral surface is disposed to receive varia tions of frictional'contact with said passive element, a motor constantly impelling rotation of said active element, a non-rotative support disposed to receive variablefrictional contact with said active element and a thermal couple whose expansions and contractions produce varying degrees of pressure between said active and passive elements while at the same time affecting oppositely the relative degrees of pressure between the rotative active element and the non-rotative support, substantially as herein set forth.

'12. The combination with damper mechanism, an axially displaceable passive element also capable of rotation for actuating said damper mechanism and a thermal couple adapted to displace said passive element bodily, of a rotative active element also bodily displaceable whose peripheral surface is disposed to receive variable frictional conact with said passive element, a non-rotative support to limit the bodily displacement of said active element in one direction,

a motor constantly tending to rotate said active element in one direction and operative connection with said damper mechanism in-' eluding a flexible actuating plate rotatively connected with said passive element for re ducing frictional interference with the latters bodily displacement in an axial direction, substantially as herein set forth.

13. The combination with damper mechanism, of bodily displaceable passive and active elements both also capable of rotation Whose peripheral surfaces are disposed to receive variations through relative bodily displacements, operative connection between said passive ele ment and said damper mechanism, a motor constantly impelling rotation of said active element in one direction, a non-rotative su port disposed to receive variable degrees of pressure against said active element and a thermal couple Whose expansions and con? tractions vary the degrees of frictional contact between said rotatable element-s contrarily to simultaneous variations in degrees of pressure between said active element and said non-r0tative support, substantially as herein set forth.

' THOMAS O. PERRY.

of frictional contact 

